I remember a child who started screaming. The child was in a stroller and the setting was a retail shop. The mother looked at the child, looked back at the sales person, and just continued talking with them, completely ignoring the screaming baby / infant / child.

Fuck you. You might be used to it, but don’t make it our problem. Soothe your kid or remove them from the store. I’m not here to listen to your kid scream.